                    <div class="control-group" style="margin-bottom:0px;display:none;" id="login_captcha_error">
                        <div class="controls">
                            <p style="color:red;font-weight:bold">验证码输入错误！</p>
                        </div>
                    </div>
                    <div class="control-group">
                        <div class="controls">    
                            <a tabindex="-1" href="javascript:void(0)" onclick="document.getElementById('captcha').src='assets/captcha/captcha.php'+'?'+Math.random();"><img src="assets/captcha/captcha.php" id="captcha" /></a>
                            <a tabindex="-1" href="javascript:void(0)"onclick="document.getElementById('captcha').src='assets/captcha/captcha.php'+'?'+Math.random();">看不清楚？点此刷新</a>
                        </div>
                    </div>
                    <div class="control-group">
                        <label class="control-label" for="login_captcha">验证码</label>
                        <div class="controls">                                                        
                            <input type="text" class="input-large" id="login_captcha" name="captcha">
                        </div>
                    </div>